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SYSTEM OVERVIEW: IV-SMART+ VENTILATION UNIT
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iV-Smart+ ventilation unit | Installation instructions
1.1 Function
The iV-Smart+ ventilation units are used to provide ventilation for living rooms and bedrooms. An
integrated ceramic thermal accumulator ensures optimum heat recovery.
The iV-Smart+ ventilation unit is a ventilation unit with
simple airflow and works according to the principle of
heat recovery by changing the direction of the fan.
The integrated thermal accumulator charges itself with
heat energy from the indoor air as it flows to the exterior
(extract air). After 70 seconds, the Xenion reversible fan
changes direction. When the fan changes direction,
it releases the stored heat energy into the incoming
outdoor air (supply air).
For this principle to work correctly and to ensure pressure stability in the room, the supply air
volume must always correspond to the extract air volume, i.e. at least two iV-Smart+ ventilation
units are required. These are operated in pairs in push-pull mode: another ventilation unit is
assigned to the ventilation unit that delivers supply air and at the same time removes used extract
air from the interior to the outside.
Thanks to a high pressure build-up and the active speed control of the motor (integrated wind
pressure stabiliser) in the Xenion reversible fan, the air flow in the system is kept almost constant
even in the event of weather-related pressure fluctuations. Thus, the sensitivity of the air flow
to pressure fluctuations corresponds to class S3 according to EN 13141-8 (max. 30 % air flow
deviation at ± 20 Pa).
In order to ensure the full functioning of the ventilation unit throughout the entire year, a tempera-
ture sensor is integrated into the Xenion reversible fan. This measures the temperature of the air
flow at the fan. If the temperature at the fan falls below + 5 °C, the reversible fan is automatically
switched to extract air mode for 4 cycles. This allows the thermal accumulator to heat up again
and prevents cooling of the interior due to cold supply air. During this phase, the operating mode
that has been set on the controller is ineffective. Subsequently, the controller switches the ventila
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tion unit back to the originally selected mode.
As standard, a washable ISO Coarse 60 % class dust filter is unobtrusively and easily accessible
integrated into the inner cover. This filters coarse dust and allergenic particles (such as coarse
flower pollen) from the air before they can enter the interior. The dust filters can be used regard
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less of the season.
Optional pollen and activated carbon filters are available for special requirements.
A decentralised ventilation unit is based on the free movement of air between individual pairs of
ventilation units. Therefore, internal doors must not have air-tight seals. Provide suitable air trans-
fer measures to create a room network: an air gap of about 10 mm below the door, unscrew the
hinges by 5 mm, use a ventilation grille or similar (cross ventilation).
70 s
